We must be in a different market here, discounts beyond 20% are fairly common here at trailer dealers, and if you shop at the hardware or the farm and ranch supply, the price will be fixed (when buying singly) but often 10-15% below MSRP, even lower during seasonal sales.
E.G. 7x16 tandems listing $5000 to $8300, selling for $4100 to $6300
6x12 tandems listing $4000 to $6000, selling for $3500 to $5000
6x12 single axle listing $2800 to $6000, selling for $2400 to $5000
These are all at the Tulsa outlet of Trailers Plus, a regional manufacturer with factory outlet dealers. There are a lot of other brands out there, covering economy market to premium market, and there really are some big differences between a $3000 6x12 and a $6000 6x12, capacity and weight of construction. A 6x12 can be an 800 pound trailer with under 3000 GVWR and lights skin, or it can be a 2000 pound trailer with 7000 GVWR, plywood-lined inside and several full-length tie down rails in the floor and each wall. The cheapest 1/2 ton or 1-ton 6x12 at Lowe's or Tractor Supply is going to be a long way from being a 2 1/2 ton 6x12 Wells Cargo.
Thus shopping online, box size alone is not enough to tell you whether price you are quotes is for something comparable or something quite different. Middle to top of market cargo trailers are comparable to national rental units, made for years of constant use. You might want to be shopping the bottom end of the market, if load capacities meet your needs.
Tom Test
Itasca Spirit 29B